Abstract: With the progress of technology and social development, special tasks such as urban counter-terrorism, personnel transportation, disaster relief and medical rescue have put forward new ...
HeavyDSparks on MSN
That was a full boom - the RC helicopter that just grenaded at 1,800 RPM
We pulled up to an RC airfield in St. George and the lineup was unreal—turbine helicopters and jets that look full-size once ...
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